From Longman Dictionary of Contemporary Englishoverstaffedo‧ver‧staffed /ˌəʊvəˈstɑːft◂ $ ˌoʊvərˈstæft◂/ adjective BEWORKERan overstaffed company, organization etc has more workers than it needs OPP understaffed
Examples from the Corpus
overstaffed• The company has more money, and it has a big, overstaffed personnel department.• There was some sort of job creation scheme going on at the overstaffed scoreboard.From Longman Business Dictionaryoverstaffedo‧ver‧staffed /ˌəʊvəˈstɑːft◂ˌoʊvərˈstæft◂/ adjectiveHUMAN RESOURCES an overstaffed company, organization etc has more people working for it than it needsSYNOVERMANNEDWe were overstaffed in some areas and not as competitive as we should have been. → opposite understaffed —overstaffing noun [uncountable]He cut the workforce sharply to eliminate overstaffing. 